Game Rules:
1. Whoever is the youngest goes first, they will be X’s. The other player gets the answer key, they will be O’s.
2. The first person picks a card and tells the other player what number they have. Then, on their dry erase board, they write the problem down and solve.
3. The other player checks that their answer is correct or incorrect using the answer key. If it is correct, the player puts down an X over their answer and keeps that card. If the answer is incorrect, the player does not put an X and puts the card back at the bottom of the card pile.
4. The other player then passes the key and picks the next card on the pile. Continue until someone gets Tic-Tac-Toe.

VA Math SOL 3.4
3.4 The student will estimate solutions to and solve single-step
and multistep problems involving the sum or difference of two
whole numbers, each 9,999 or less, with or without regrouping.